Aligning Reference Frames Using Quantum States

Details Aligning Reference Frames Using Quantum States Aligning Reference Frames Using Quantum States

2001-06-04

arxiv.org/abs/quant-ph/0106014v1

Phys. Rev. Lett. 87, 257903 (2001)

Physics

Quantum Physics

4 pages

Scientific paper

10.1103/PhysRevLett.87.257903

We analyze the problem of sending, in a single transmission, the information required to specify an orthogonal trihedron or reference frame through a quantum channel made out of N elementary spins. We analytically obtain the optimal strategy, i.e., the best encoding state and the best measurement. For large N, we show that the average error goes to zero linearly in 1/N. Finally, we discus the construction of finite optimal measurements.

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